CN201187344Y

CN201187344Y - Gasoline passenger car turbocharger with pressure relief protection

Info

Publication number: CN201187344Y
Application number: CNU200820035749XU
Authority: CN
Inventors: 黄发长
Original assignee: CHUZHOU YUEDA INDUSTRY Co Ltd
Current assignee: CHUZHOU YUEDA INDUSTRY Co Ltd
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2009-01-28
Anticipated expiration: 2018-04-30

Abstract

The utility model relates to a turbocharger with the pressure-relief protection function for a gasoline car. A turbine and a compressor impeller are in the coaxial arrangement. The air inlet side of a turbine casing communicates with the exhaust pipe of an engine. The compressor impeller is positioned inside a compressor shell. The turbocharger is characterized in that a by-pass air hole is formed on the side wall of the runner of the compressor and communicates with the runner; and a pressure relief valve is arranged on the by-pass air hole. The turbocharger avoids the excessive pressurization and the surging when the engine stops suddenly or is in emergency idle state, thereby efficiently protecting the turbocharger and the engine.

Description

The spark ignition passenger car turbosupercharger that has decompression protection

Technical field

The utility model relates to technical field of engines, a kind of exhaust-gas turbocharger that is particularly suited for being applied in the spark ignition passenger car of more specifically saying so.

Background technique

Supercharging technology is one of major measure that improves engine performance, and what be most widely used is exhaust gas turbocharge.Turbosupercharger is the critical component of supercharged engine, it need not power, the exhaust gas-driven turbine high speed rotating that utilizes motor to discharge, send in the cylinder after driving the coaxial compresses fresh air of compressor impeller constant speed rotation the gas compressor inspiration, make the interior air density of cylinder increase sharply, oil inflame is more abundant, thereby improves the power of motor, improve the condition of burning, reduce emission of automobile wastes and pollute; Because oil inflame is more abundant, make the oil consumption of motor reduce about 5%～10% simultaneously.Turbosupercharger has motor and improves power, reduces oil consumption and improve effect such as motor vehicle emission.

Present domestic diesel oil is ripe relatively with turbocharging technology, the turbine case of diesel oil vehicle turbocharger and turbine material adapt to engine exhaust temperature below 800 ℃, the working speed of pressurized machine maintains about in the of 80000 rev/mins, and is not high relatively to aspects such as the anti-surge requirement of pressurized machine.By contrast, petrolic delivery temperature is up to more than 950 ℃, the maximum speed of pressurized machine reaches 200000 rev/mins, working speed reaches 140000 rev/mins, petrolic working condition is more complicated and changeable than diesel engine, the labor aptitude of pressurized machine under different operating modes is had higher requirements, such as the detonation pinking of avoiding motor, the surge of pressurized machine etc., therefore, existing diesel oil can not be applicable to petrol engine fully with turbocharging technology.

The applying working condition of spark ignition passenger car is comparatively complicated, the turbo charger speed that is complementary with it is very high, though engine speed can in time lower when engine sudden parking or urgent idling, but turbosupercharger still can high speed rotating because of rotator inertia, continuation is compressed the fresh air that sucks in and is desired to be sent to cylinder, but this moment, because the choke valve of motor has been closed or is almost totally closed, can not be entered cylinder by the high-pressure air after the turbosupercharger compression, will make the rapid moment raising of pressure ratio of pressurized machine like this, cause the surge of pressurized machine, damage or breaking-up pressurized machine, even can cause wider breaking-up to motor since these as yet not the technical barrier of fine solution, present, the domestic relevant product that does not occur as yet, and the technology contents relative complex of external product costs an arm and a leg, and is difficult to extensive use.

The model utility content

The utility model is for avoiding above-mentioned existing in prior technology deficiency; a kind of spark ignition passenger car turbosupercharger that has decompression protection is provided; make it possible to satisfy spark ignition passenger car and do not form supercharging and surge when engine sudden parking or the urgent idling, and then realize effective protection pressurized machine itself and motor with turbosupercharger.

The technological scheme that the utility model technical solution problem is adopted is:

The utility model has the spark ignition passenger car turbosupercharger of decompression protection, and its structural type is turbine and the coaxial setting of compressor impeller, and the air inlet side of turbine case is communicated with engine exhaust pipe, and compressor impeller is positioned at compressor casing.

Structural feature of the present utility model is on the runner sidewall of gas compressor, and the bypass pore that communicates with runner is set; On described bypass pore, Decompression valves is set.

Structural feature of the present utility model also is:

Described bypass pore is positioned on the runner exit one distolateral wall of described gas compressor.

Described Decompression valves is set to diaphragm type structure, and described diaphragm type structure is with diaphragm the Decompression valves inner chamber to be divided into control chamber and active chamber; Described control chamber is to communicate with the engine charge pipeline by the Decompression valves valve; Described active chamber is to form to be communicated with between bypass pore and compressor air inlet machine side.

Described Decompression valves is to be fixedly installed on the compressor casing by attachment screw with its Decompression valves valve gap.

Compared with prior art, the beneficial effects of the utility model are embodied in:

When 1, enforcement of the present utility model made the motor proper functioning, Decompression valves was in closed condition, and the bypass pore in the blower outlet runner is by shutoff, and pressurized air all enters cylinder, realized turbosupercharging; Stopping in emergency or during urgent idling; the engine throttle valve is closed or is almost totally closed; blower outlet place air pressure raises rapidly; moment forms high-pressure air opens Decompression valves; bypass pore in the blower outlet runner is by open-minded, and the high-pressure air that the blower outlet place is formed is released, and pressurized machine does not produce high pressure ratio; avoid pressurized machine to cross the generation of supercharging and surging phenomenon, protected the proper functioning of pressurized machine and motor effectively.

2, the utility model is simple in structure, easy to implement, can not bring increase bigger on the cost.

Description of drawings:

Fig. 1 is the utility model turbosupercharger internal structure schematic representation.

Fig. 2 is the utility model Decompression valves rigging position and structural representation.

Number in the figure: support in 1 turbine case, 2 turbines, 3 engine charge pipelines, 4 compressor air inlet machine sides, 18 compressor impellers, 20 compressor casings, 21 bypass pores, 22 Decompression valvess, 30 attachment screws, 31 Decompression valves valves, 32 Decompression valves springs, 33 diaphragms, 34 diaphragms, 35 diaphragms support outward, 36 valve gaps.

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment:

Referring to Fig. 1, form routinely, turbine 2 and compressor impeller 18 coaxial settings, the air inlet side of turbine case 1 is communicated with engine exhaust pipe, and compressor impeller 18 is arranged in compressor casing 20.Exhaust gas-driven turbine 2 high speed rotating that motor is discharged, drive coaxial compressor impeller 18 constant speed rotation, send into cylinder after gas compressor one side inhaled air compressed, make that air density increases exponentially in the cylinder, and then obtain the effect of supercharging.

In the present embodiment, be on the runner sidewall of gas compressor, the bypass pore 21 that communicates with runner is set; Decompression valves 22 is set on bypass pore 21.

During the motor proper functioning, Decompression valves is in closed condition, and the bypass pore in the blower outlet runner is by shutoff, and pressurized air all enters cylinder, realizes turbosupercharging; Stopping in emergency or during urgent idling; the engine throttle valve is closed or is almost totally closed; blower outlet place air pressure raises rapidly; moment forms high-pressure air opens Decompression valves; bypass pore in the blower outlet runner is by open-minded, and the high-pressure air that the blower outlet place is formed is released, and pressurized machine does not produce high pressure ratio; avoid pressurized machine to cross the generation of supercharging and surging phenomenon, protected the proper functioning of pressurized machine and motor effectively.

Referring to Fig. 1, Fig. 2, in the present embodiment, bypass pore 21 is positioned on the runner exit one distolateral wall of compressor casing 20.Decompression valves 22 specifically is set is diaphragm type structure, diaphragm type structure is with diaphragm 34 the Decompression valves inner chamber to be divided into control chamber and active chamber, and control chamber is to communicate with engine charge pipeline 3 by Decompression valves valve 31; Active chamber is to form to be communicated with between bypass pore 21 and compressor air inlet machine side 4; Decompression valves is fixedlyed connected with compressor casing 20 by attachment screw 30 with Decompression valves valve gap 36.

In concrete the enforcement, in the control chamber of Decompression valves, be provided with in Decompression valves spring 2 and the diaphragm and support 33, in the Decompression valves active chamber, be provided with diaphragm and support 35 outward.

In the motor normal working, the elastic force acting in conjunction of gas pressure and Decompression valves spring 32 has overcome compressed-air actuated active force in the compressor casing runner in the engine charge pipeline 3, make Decompression valves diaphragm 34 cover on the bypass pore 21, formation is to the shutoff of bypass pore 21, and the pressurized air of gas compressor all enters in the engine cylinder; When engine sudden parking or urgent idling, 31 li of Decompression valves valves are vacuum or vacuum almost, pressurized air in the compressor passage to Decompression valves outer support 35 and the active force of the diaphragm 34 air effect power that overcomes 31 li of spring 32 and Decompression valves valves make Decompression valves diaphragm 34 break away from the shutoff of bypass pores 21, pressurized air in the gas compressor flows into compressor air inlet machine side 4 by active chamber in the Decompression valves, prevented that effectively pressurized machine from crossing the surge that supercharging causes, guaranteed the proper functioning of pressurized machine and motor.

In concrete the enforcement,, require 240 ℃ of Decompression valves diaphragm heatproofs, do not produce breakage, crackle and distortion through after the action 500,000 times according to the operating mode of motor; The Decompression valves spring is in 260 ℃ temperature, and the parameters and the performance of working after 1,000,000 times still remain within the allowed band.

Claims

1, the spark ignition passenger car turbosupercharger that has decompression protection, turbine (2) and the coaxial setting of compressor impeller (18), the air inlet side of turbine case (1) is communicated with engine exhaust pipe, and compressor impeller (18) is positioned at compressor casing (20); It is characterized in that on the runner sidewall of gas compressor, the bypass pore (21) that communicates with described runner is set; Decompression valves (22) is set on described bypass pore (21).

2, the spark ignition passenger car turbosupercharger that has decompression protection according to claim 1 is characterized in that described bypass pore (21) is positioned on the runner exit one distolateral wall of described gas compressor.

3, the spark ignition passenger car turbosupercharger that has decompression protection according to claim 1 is characterized in that described Decompression valves (22) is set to diaphragm type structure, and described diaphragm type structure is with diaphragm (34) the Decompression valves inner chamber to be divided into control chamber and active chamber; Described control chamber is to communicate with engine charge pipeline (3) by Decompression valves valve (31); Described active chamber is to form to be communicated with between bypass pore (21) and compressor air inlet machine side (4).

4, the spark ignition passenger car turbosupercharger that has decompression protection according to claim 1 is characterized in that described Decompression valves is to be fixedly installed on the compressor casing (20) by attachment screw (30) with its Decompression valves valve gap (36).